guys that converted 8ight truggy to E

[JThiessen]

Tekno makes a pretty nice conversion also.
Their kit replaces the entire chassis. I'd recommend going with the long shank pinion (over the clutch system) - and make sure you get the longer of the two battery trays.
If you go with theirs, you need to know which motor you are going to run - the motor fits inside the mount, instead of just being face mounted.

[Marvin]

In all honesty, if you want a reliable set-up, I'd run the Mamba Monster 2200kV combo on 4S for track use. 5S for bashing.